Valve.



T. W. DEMAREST.

VALVE.

LPYLIUATIUN FILED JULY 22, 190B.

921 ,209. Patented May 11, 1909.

INYENTOR UNITED sfra rps ngrsnr OFFICE.

THOMAS W. DEMAHEST, OF FORT WAYNE, INDIANA,

VALVE.

To altwhom it may concern.-

Be it known that l, THOMAS W. DEMAR- Es'r, a citizen. of the United States, residing at Fort Wayne, in the county of Allen and j State of Indiana, have invented certain new and useful improvements in Valves, of which the following is a specification.

The invention relates to valves and particularly straight way valves of the swinging or oscillating gate type. The invention has for its principal objects, the simplification of the structure of valves of this character; the provision of a valve wherein the removable cap commonly employed in valves of this type is done away with and the Whole body made in one integral casting; the provision of a seat for the valve which is readily removable for renewal and to give access to the valve disk, and which also serves as a pipe connection; the provision of improved stop means for limiting the movement of the valve without imposing strain on parts sus ceptible of injury; and the provision of an improved operating pin constructed to make tight contact with its" bushing and at the same time be rigidly supported at its inner end. Certain embodiments of the invention are illustrated in the accompanying drawingis, Whereln lgure 1 1s a plan view of the valve,

F1 one 2 is a transverse section on the line II I of Figure 3,

Figure 3 is a longitudinal section on the line III III of Figure 1,

Figure 4 is a longitudinal section eorresponding;' to that of Figure 3, but of a slightly modified construction,

Figure 5 is a partial sectional view showing a modified form of o crating pin, and

F lgure 6 is a detail section through. the and of the operating lever.

Referring to the drawings, 1 is the valve body preferably made inv the form of an integral casting as shown, .2 is the valve carrier secured to the operating pin 3, 4 is the vuivc disk which is rcinovahly seated in the ring at the end of the carrier 2, 5 is a couplin mem- I her screw threaded into the passage t irough the valve body, (5 is tegral with the body be secured to a brac strain of supporting the valve from the connections, and 7 is the operating fitted on to the squared end of the operating pin and provided with a pair of downwardly projecting lugs 8* 8 adapted to take against 1portion and adapted to (it and so remove the pipe Specification of Letters Patent.

application flied July 22, 1908.

the supporting lug inhandle i Patented May 1 1, 1909f Serial No. 444,762

in its extreme positions. The provision of this stop means prevents the imposition of undue strain on parts of the valve susceptible of injury.

The o 'ierating pin 3 is supported at its upperend in a bushing 10 of relatively soft metal screw threaded into the valve body, and at its lower end is journalcd in a recess 11 in the valve body. The pin has an angular portion intermediate its two bearin s, and the valve carrier 2 is mounted "upon this angular portion. The pin is also provided with a rounded thrust shoulder 12 adapted to take against a corres ondingly shaped I seat on the bushing 10. l ight engagement 1 f a ring 9 on the coupling 5 when the valve is l between the shoulder 12 and its seat is secured by providing the lower end of the pin i with the groove 13 whereby the pressure in I the valve bodyiis permitted to act upon the end of the pin and thus thrust it endwise. l By this arrangement an effective support of l the valve carrier and valve disk is secured i by reason of the two point bearing of the pin {3, and a tight iit is at the same time obtained between the shoulder 12 and its seat. The coupling member 5 is preferably made i of such diameter at its lower screw threaded end, that when removed, enough space is provided for the removal of the valve disk 4, and also of the carrier 2, so that the operating parts may be rcmo red and refitted very easily, and without'rclnoving the valve bodcgr from the position in which it is secure The lower end 14 of the member 5 is ground to constitute a seat for the disk 4, so that all of the wearing parts are easily accessible for renewal, or re-grinding.

in Figure 4 a somewhat diii'crent arrangement of operating pin 3 is shown, which pin is rccessei at its lower end to receive a spring 15, which spring 15 assists in forcing the shoulder 12 against its seat in the bushing .10. A groove 16 is provided for admitting pressure to the recess in which the spring is mounted, and so augmenting the longitudinal pressure upon the pin. in other respects the valve construction is precisely the same as illustrated in Figure 3. i In Figure 5 a further modification of the operating pin is illustrated, the distinction over the construction of Figure 4 being that no groove is provided for admitting pressure f to the recess carrying the s rin 15. In this construction the spring a one 18 dependi ed upon to secure a tight joint between the collar 12 and its seat in the bushing 10. In other respects the valve construction is the same as heretofore described and illustrated in Figures 1, 2 and 3.

Having thus described my invention and versely across the passage, and a coupling 1 member threaded into one end of the passage, the arrangement of the parts and the diameter of the coupling being such as to permit the remo al of the valve disk and the carrier togetherwhen the coupling member is removed.

2. A valve comprising a body portion provided with' a transverse passage, a dis mounted to swing transverselT J across the passage, and a coupling mom er threaded into one end of the passage and provided with a wrench engaging portion and a circu lar exterior portion, an operating handle for swin ing the disk and stop means on the hancfie for engagin the circular portion when the valve reac es extreme position.

3. A valve comprising a body portion provided with a transverse passage, an annular disk carrier mounted to swing transversely across the the passage, a disk slidahly mount ed in the carrier, and a coupling member threaded into one end of the passage, the ar rangenicnt of the parts and the diameter of .i.

the socket, and a passage loading from. the .7

pressure side of the valve to the end of the pin in the socket for securing tight engage ment at the thrust bearing.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses.

T. V DEMAlthlSl".

Witnesses:

W. L. W111, H. C. RIPPE.

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